|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
01
|
IDLE AIR CONTROL
|
Ignition ON,
engine OFF
Press F5 key
in the system main menu, using the arrow keys select the desired test and
confirm with YES. Follow the instructions in the TECH 1 Display.
Note:
The idle
speed adjuster is actuated by TECH 1, causing the valve cone to be moved in
and out. The test is completed after a maximum of 30 s.
|
0 to 160 steps
If removed, but still
electrically connected, the in and outward movement of the valve cone must
visible
|
35
|
C
5, C 6,
C
8, C 9/
D
1
|
|
Trouble-shooting:
|
Nominal Value:
|
Cause of
Fault:
(If nominal
value is not attained)
|
|
· Ignition OFF
· Disconnect plug from idle
speed adjuster M 66
· Ignition ON
· TECH 1 in mode
"F5" IDLE AIR CONTROL
· Measure voltage: (20V/AC)
|
|
· Lead interruption
from: stepper motor A, C, B, D
to: control unit Ter. C 9, C 5, C 8, C 6
|
|
from: wiring harness plug Ter. A
to: wiring harness plug Ter. C
and
from: wiring harness plug Ter. B
to: wiring harness plug Ter. D
|
A/C: 5.6 to
6.9 ~volts
B/D: 5.6 to
6.9 ~volts
|
|
|
· Ignition OFF
· Remove motor M 66
· Connect plug to idle
speed adjuster M 66
· Ignition ON
|
|
|
|
TECH 1 in
mode "F5" IDLE AIR CONTROL Compress pintle slightly with thumbs
|
Pintle moves
in and out noticeably
|
· Servo motor defective
|
|
· Ignition OFF
· Measure resistance of
coils A-B and C-D Disconnect plug from stepper motor
|
55 W - 65 W
(cold)
45 W - 60 W
(warm)
|
· Servo motor defective
|
|
|
|
|
|
|
|
|
